US3638845A - Deflecting guide mechanism for bands coated on one side - Google Patents

Deflecting guide mechanism for bands coated on one side Download PDF

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Publication number
US3638845A
US3638845A US43855A US3638845DA US3638845A US 3638845 A US3638845 A US 3638845A US 43855 A US43855 A US 43855A US 3638845D A US3638845D A US 3638845DA US 3638845 A US3638845 A US 3638845A
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US
United States
Prior art keywords
web
guide
support
guide mechanism
rollers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US43855A
Other languages
English (en)
Inventor
Peter Herzhoff
Wolfgang Schweicher
Fritz Maus
Willi Wasser
Kurt Browatzki
Hans Gref
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Agfa Gevaert AG
Original Assignee
Agfa Gevaert AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19691936175 external-priority patent/DE1936175C3/de
Application filed by Agfa Gevaert AG filed Critical Agfa Gevaert AG
Application granted granted Critical
Publication of US3638845A publication Critical patent/US3638845A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D15/00—Apparatus for treating processed material
    • G03D15/02—Drying; Glazing
    • G03D15/022—Drying of filmstrips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/517—Drying material

Definitions

  • Means are July 16, 1969 Germany ..P 19 36 175.2 provided for Supplying compressed air to the Space fol-med between the support, the side screens and the web, whose [52] US. Cl ..226/97, 34/156 reverse Side is id d over n f the periphery of the guide [51] Int. Cl ..B65h 17/32 n [58] Field of Search ..226/97, 7; 39/23, 156
  • This invention relates to a deflecting guide mechanism for bands coated on one side, for example photographic films, especially for drying chambers through which the web is guided meander fashion in elongated loops.
  • tunnel dryers are used in which the web travels at a uniform distance beneath blowboxes, usually provided with nozzles. The web is guided either with clips over rollers or over large drums with diameters of meters and more.
  • Clip systems are mechanically complicated and are not suitable for use with paper substrates on account ofthe danger of tearing.
  • the webs are guided over rollers, they undergo an increase in tension from roller to roller through bearing friction.
  • each roller must have a minimum looping and since only the reverse side of the wet web should come into contact with the roller, difficulties are encountered in guiding the web, and limits are soon imposed upon any increase in the size of the drying zone.
  • the web does not undergo any increase in tension along the drying path.
  • Another favorable factor is that the layer support lies uniformly on the surface of the drum throughout the entire drying cycle. Unfortunately, the dimensions of a drying drum cannot be structurally increased beyond a certain extent and the ratio of overall volume to web length is highly unfavorable in this otherwise extremely advantageous type of dryer.
  • deflecting guide means which according to the invention are distinguished by the fact that they comprise a fixed support which is arranged transversely of the direction of travel of the web in the vicinity of the loop to be deflected and which, at both its ends, carries side screens which are arranged perpendicularly of the surface of the web parallel to one another and which have openings arranged on an arc concentric with the deflection axis of the band and between which guide rollers for the web are rotatably mounted, compressed air being supplied to the space formed between the support, the side screens and the band whose reverse side is guided over part of the periphery of the guide rollers.
  • a contactless band guide element is obtained because the web rests on a cushion of air.
  • FIG. I is a radial section of a web deflector
  • FIG. 2 is an axial section of a web deflector of this invention
  • FIG. 3 is a longitudinal section through a dryer
  • FIG. 4 is a longitudinal section through a modified dryer.
  • FIGS. 1 and 2 show by way of example an element of this kind for deflecting the web through 180 in longitudinal section and cross section respectively.
  • a band 1 travelling in the direction of the arrow is guided over guide rollers 2, the reverse (i.e., uncoated) side of the web facing the guide rollers 2.
  • the web Before the dryer is started up, the web initially lies on an emergency roller 3 (FIG. 2).
  • deflection axis for the web is denoted by the reference 311.
  • the edges of the web are almost in contact with screens 6 acting as lateral guides, narrow gaps being left between the screens and the edges ofthe web.
  • the screens 6 are arranged on a support 8 and are provided with fan sockets 5.
  • the fixed axle of the roller 3 is secured by means of spokes 4 in the fan socket 5.
  • Strips 9 seal off the space above the support 8, leaving a narrow gap for the passage of the web I.
  • Openings 7 are arranged on an arc in the screens 6.
  • the guide rollers 2 are preferably mounted in air bearings (not shown).
  • FIG. 3 is a longitudinal section through a web-deflecting element for use in a space-saving dryer.
  • the contactless deflecting elements are arranged above vertically arranged blowing ducts 10 provided with nozzles 10a directed toward the plane of the web.
  • the web I is guided in parallel elongated loops over guide rollers 2 and 11.
  • the air required to inflate the loop is delivered through rectangular sockets 13.
  • the rollers 11 are optionally driven to reduce and stabilize web tension. To facilitate insertion of the web the rollers 11 can be displaced vertically until they are just below the rollers 2 either individually or in groups by a suitable mechanism (not shown), for example vertical spindles and nuts on which the bearings of the rollers 11 are arranged.
  • the drying cycle can be conveniently adapted to a technologically predetermined temperature-time curve by appropriately shortening the distance which the web has to travel through a drying zone without any change in its speed.
  • FIG. 4 shows another example of a dryer.
  • the overall volume originally provided for a drum dryer is in this case very favorably utilized by the starlike arrangement of the elongated loops shown in sections.
  • a much more favorable overall volume: web length ratio is obtained than in a drum dryer of the same diameter.
  • a deflecting guide mechanism for webs coated on one side, for example photographic films, especially for drying chambers, through which the web is guided meander fashion in elongated loops, comprising a fixed support (8) which is arranged transversely of the direction of travel of the web 1 in the vicinity of the guide loop and which at both its ends carries side screens (6) which are arranged perpendicularly of the surface of the web parallel to one another and which have openings (7) arranged on an arc concentric to the deflection axis (3a) of the web (1) and between which guide rollers (2) for the web are rotatably mounted, and means for supplying compressed air to the space formed between the support (8), the side screens (6) and the web (1), whose reverse side is guided over part of the periphery of the guide rollers (2).

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Drying Of Solid Materials (AREA)
  • Advancing Webs (AREA)
  • Paper (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
US43855A 1969-07-16 1970-06-05 Deflecting guide mechanism for bands coated on one side Expired - Lifetime US3638845A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691936175 DE1936175C3 (de) 1969-07-16 Umlenkvorrichtung für einseitig beschichtete Bänder

Publications (1)

Publication Number Publication Date
US3638845A true US3638845A (en) 1972-02-01

Family

ID=5739990

Family Applications (1)

Application Number Title Priority Date Filing Date
US43855A Expired - Lifetime US3638845A (en) 1969-07-16 1970-06-05 Deflecting guide mechanism for bands coated on one side

Country Status (6)

Country Link
US (1) US3638845A (enrdf_load_stackoverflow)
JP (1) JPS498136B1 (enrdf_load_stackoverflow)
BE (1) BE753130A (enrdf_load_stackoverflow)
CH (1) CH516825A (enrdf_load_stackoverflow)
FR (1) FR2055219A5 (enrdf_load_stackoverflow)
GB (1) GB1253955A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3920287A (en) * 1973-07-16 1975-11-18 Ici Ltd Seal
US3984150A (en) * 1974-11-04 1976-10-05 Imperial Chemical Industries Limited Sealing apparatus
US4760946A (en) * 1985-04-04 1988-08-02 E. I. Du Pont De Nemours And Company Device for turning a moving web
EP1090864A3 (de) * 1999-10-04 2001-04-18 Fluor Technik System GmbH Behandlungsvorrichtung für Materialbahnen
CN108731445A (zh) * 2018-06-16 2018-11-02 江苏吉隆环保科技有限公司 一种化纤棉烘干装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5146540U (enrdf_load_stackoverflow) * 1974-10-01 1976-04-06
JPS52141436U (enrdf_load_stackoverflow) * 1976-04-17 1977-10-26

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3250019A (en) * 1962-09-10 1966-05-10 Edward D Beachler Dryer felt

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3250019A (en) * 1962-09-10 1966-05-10 Edward D Beachler Dryer felt

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3920287A (en) * 1973-07-16 1975-11-18 Ici Ltd Seal
US3984150A (en) * 1974-11-04 1976-10-05 Imperial Chemical Industries Limited Sealing apparatus
US4760946A (en) * 1985-04-04 1988-08-02 E. I. Du Pont De Nemours And Company Device for turning a moving web
EP1090864A3 (de) * 1999-10-04 2001-04-18 Fluor Technik System GmbH Behandlungsvorrichtung für Materialbahnen
CN108731445A (zh) * 2018-06-16 2018-11-02 江苏吉隆环保科技有限公司 一种化纤棉烘干装置

Also Published As

Publication number Publication date
DE1936175A1 (de) 1971-01-28
GB1253955A (en) 1971-11-17
BE753130A (nl) 1971-01-08
DE1936175B2 (de) 1976-09-09
CH516825A (de) 1971-12-15
FR2055219A5 (enrdf_load_stackoverflow) 1971-05-07
JPS498136B1 (enrdf_load_stackoverflow) 1974-02-25

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